Question

A rock is dropped from a cliff and into the ocean. The height h (in feet) of the rock after t sec is given by h = −16t^2 + 144.

a) What is the initial height of the rock?

b) When is the rock 80 ft above the water?

c) How long does it take the rock to hit the water?

Answer 1

a) the rocks initial height is 144 ft.
b) after 2 seconds, the rock is 80 ft. above the water.
c) it takes 3 seconds for the rock to hit the water.

Answer 2

C


BECAUSE IT WILL HIT HARDER